Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7e77a69e4f7b55…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 19:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0013e94ec3d72c5d65ee5f5c65770776 SHA-1: 2fddc09883b33d807eaed67c8d1ebee057681449 SHA-256: 0b7e77a69e4f7b55abf1367433bca8bfabb61fa2cd8819a76ea7243dcc46c39b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. This suggests a phishing or scam attempt, likely using the embedded link to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/123?utm_term=minecraft+anti+world+er+plugin PDF link annotation
    • http://megalit-korolev.ru/computer_hardware_engineer_salary_in_florida6y634.pdfIn PDF document text
    • http://romeoplanet.club/827677621522dwdi.pdfIn PDF document text
    • http://legko.travel/what_cut_of_beef_is_used_for_steak_tartareqki6y.pdfIn PDF document text
    • http://doordash.link/62677686473dypc1.pdfIn PDF document text
    • http://geguxejap.22web.org/fekefoku.pdfIn PDF document text
    • http://rivalo130.com/kegejafubadenojibipif8hcj0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98315a9-f5f9-4354-9780-a8a4f36a60b9/13631778113.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/46808296571.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/hosanna_hillsong_drum_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/graco_solano_crib_with_drawer_instructions.pdfIn PDF document text
    • http://ruwiluleter.epizy.com/gw2_craft_leveling_guide.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_0fd1639779e04394b6463e92e4b2791f.pdf?index=trueIn PDF document text
    • https://b32e410f-f365-4205-840f-53103702c783.filesusr.com/ugd/51ece5_6cd0087b5ddf46d8a431692d64b5335b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37c5b54-6f1c-4534-9534-2979e61bf7e7/how_to_be_a_good_medical_office_receptionist_resume.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_3bda5fcc43c04aa1804ea71da6b8bfb7.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_e54dc9d773174179a56a3f8ac712b165.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7951a0b-7257-4dc6-b930-f6214535c95e/rode_videomic_pro_plus_vs_rode_videomic_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab68164-0df7-4f12-af8a-f6c1c06ccbc6/yamaha_htr_5830_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ddaeef1-a353-4cea-940e-d385e9b0c828/87478491227.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_b0342c0b9da24f38aa8071bac38be793.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_f45fc63399984a91b33a2239a5539b74.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 5240 bytes
SHA-256: 686f17529849bf655fb7a6d87331544a9e93990ec55a5e9aea67ff7bb696c413
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 10892 bytes
SHA-256: 0960954d0e37e3b7719c1dfd76829d41ef885abea030dd2af857fb93ff96b8f9

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